Thomas barnes



(NO Hotie'l.)

. T. BARNES.

BOILER r No. 578;538. Patented Mali. 9, 1897;

ATTOIPIVEAYS UNITED STATES F TENT OFFICE THOMAS BARNES, OF VANCOUVER,CANADA, ASSIGrNOR TO HIMSELF, HENRY HARA, I-IENRY LOMAS, ROBERT SMITH,ED\IVARD OLAYTON, THOMAS TURNER, DANIEL SNELL, JAMES' AUSTIN, TVILLIAMCAMPBEILL, JOHN HOWVE, GEORGE HUNT, LUDVVIGr HULLGrLEN, ROBERT MCMURRY,J., A. TOMLINSON, ALFRED STTTDDEN, ROBERT INNES, VVALTER BARNES, ANDFRANCIS H. SANKEY, OE SAME PLACE.

BOILER.

SPECIFICATION forming part of Letters Patent No. 578,538, dated. March9, 1897.

Application filed February 25, 1896. Serial No. 580,683. (No model.)

.fullest advantage and without any appreciable loss.

r The invention consists principally of a sei ries Of segnlental andlongitudinally-extending water-legs which form a series ofsimilarly-shaped passages or channels for the products Of combustion,said channels being connected together alternately at opposite ends ofthe boiler, whereby such products are caused to traverse said channelsconsecutively.

The invention also consists of certain parts and details andcombinations of the same, as Will be fully described hereinafter andthen pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters Of reference indi- Gatecorresponding parts in both tignres.

Figure 1 is a front elevation of the ilnprovement with one-half insection, and Fig. 2 is a longitudinal section of the same on the line 22 of Fig. 1.

The improved boiler is provided With an anzziliary shell A, formed inits lower half with a water-leg B, the front end of which is depressed,as plainly shown in Figs. 1 and 2, so as to form sufficient room forafire-box O, containing the usual grate, ash-pit, and firing and ash-pitdoors. The fire-box C opens at its rear end into two channels orpassages D D',

, extending longitudinally and formed by the water-legs B-B' 13 of whichthe leg B' is sogmental in cross-Section, and extends about half-way thelength of the boiler from the rear forward, as is plainly shown in Fig.2.

The other water-leg, B extends from one head of the boiler to the otherand is likewise segmental and concentric to the leg B' and the main partof the sl1ell A.

The leg l is formed With radial smoke passages Or pipes B and the rearend of the channel D is closed by the rear end of the legB to cause theheat and smoke in the channel D to pass through the pipes 13 to reachthe channel D'.

The channel D connects at its rear end with a water-jacketed l hood E,held on the rear head of the shell A, it being understood that saidchannel extends through the head Of the shell, as plainly indicated inFig. 2. The hood E also opens upon a channel D formed by the water-leg Bprevionsly 1nentioned and. by another water-leg B like-Wise extendinglongitudinally and concentric to the other water-legs.

The front end of the channel B opens into a hood E', held on the fronthead of the boiler, and this hood E' opens into another channel D formedby the water-leg B and a waterleg B of which the latter is concentric tothe water-legs B E and B'. The rear end of the channel D opens into ahood E held on the rear head of the shell A, and this hood opens into achannel or line D concentric with the ably 1nade in the shape of hingedsegmental doors, so that they can be readily opened for convenientlycleaning the channels D D' D D D as well as the lines Gr.

The water-leg B is provided in its lowermost portion with a water-feedpipe H, and

from this lowermost portion of the leg B extends the vertical leg orstand-pipe B which opens at its upper end into the lower portion of theleg 13 as plainlyindicated in Fig. 1. The vertical leg B also connectsby feed-nipples I I' with the lower portions of the legs B B and. branchpipes I connect the legs B B' with each other near their lower ends.

, The upper ends of the legs B' B are connected by nipples I with thegeneral watercompartrnent in the shell A, (see Fig. 1,) and similarnipples I connect the upper ends of the legs B B with thewater-compartment, and nipples 1 connect the upper ends of the legs B Bwith each other. By the arrangement thus described a completecirculation of the water is established through the several water-legs.Thelower ends Of the waterlegs B' B 13 rest on jacketed lugs B formed onthe vertical water-leg B as plain] y indicated in Fig. 1.

Now it. will be seen that when the hoods E E' E2 are closed and heat isgenerated in the fire-box 0 the smoke and gases pass into the channels Dand D' from the former through the passages B into the channel D nearthe rear end thereof, the smoke and gases from the channel D' passingthrough the hood E into andthrough the channel D to the forward end ofthe boiler and into the hood E', to. then pass rearwardly through thechannel D: and flues Gr into the rear hood E to then again travelforwardly through the channel D and iiue Gr' into the smoke-stack F. Theboiler is also provided With suitable drainpipes and manholes to cleanthe water-legs from sediment and other i1npurities.

It, will be seen that by the arrangement described the beat circulatesthrough the boiler and comes in contact With a large heatingsurface, sothat the heat generated in the firebox is utilized to the greatestadvantage and With hardly any loss of units of heat.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- 1. A boiler, provided With a series ofsogmental and longitudinally-extending waterlegs which form a series ofsimilarly-shaped channels for the products of combustion, said channelsbeing connected together alternately at opposite ends of the boiler,whereby said products are caused to traverse said channelsconsecutively, a vertically-disposed water-leg for connecting thelowermost waterleg with the uppermost water-leg, and provided withopenings in its Sides and nipples ing provided with waterjackets,substantially as set forth.

3. A boiler co1nprising ct shell, a series of segmental andlongitudinally-extending water-legs which form a series ofsimilarlyshaped channels for the products of combustion, a fire-box,formed between the lowermost of said water-legs, and an intermediatesegmental water-leg between the two lowermost legs and extending fromthe rear end of the boiler to the fire-box, substantially as shown anddescribed.

t. A boiler comprising a shell, a series: of segmental andlongitudinally-extending water-legs which form a series ofsimilarlyshaped channels for the products of combustion, a fire-boxformed between the lowermost of said water-legs, and an intermediatesegmental water-leg between the two lowermost legs and extending fromthe rear end of the, boiler to the fire-box, said intermediate Water-legbeing formed Witli pipes or passages for the smoke and gases to passfrom a bottom channel to the next channel above, substantially asdescribed.

5. Aboiler, substantially as described, comprising a shell, and aplurality of segmental water-legs arranged one above the other in saidshell, the lower portion of the lowermost water-leg ternninating shortof the front end of the boiler, as set forth.

THOMAS I-ARNES.

VVitnesses:

VV. I PE'I'EESON, F. J. SGHOFIELDL

